Voxer turns your Android device into a PTT (Push-to-Talk) walkie-talkie. When you speak into your phone, other users will hear what you are saying in real-time. The messages are also saved, so other people can listen to them at a later date in case they were offline during the broadcast.

With Voxer you can also send text messages to one or multiple users, exchange photos with your buddies and let your friends know your current location. The app even allows you to create messages while offline and will deliver them when an internet connection becomes available.